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phpstrpos

Check if one of multiple words exists in the string?

I have a string like this:

$str = "it is a test";

I want to check it for these words: it, test. I want to it returns true if there is at least one of those words in the string.

Here is what I did: (though it does not work)

$keywords = array ('it', 'test');
if(strpos($str, $keywords) !== false){ echo 'true';}
else echo 'false';

How can I do that?

Solution

  • Simply checking using preg_match(), you can add many different words in the pattern, just use a separator | in between words.

    The following will match partial words, so larger words like pit, testify, itinerary will be matched. The pattern is also case-sensitive, so It and Test will not be matched.

    $str = "it is a test";
if (preg_match("/it|test/", $str))
{
    echo "a word was matched";
}

    Sorry, I didn't know that you were dealing with other languages, you can try this:

    $str = "你好 abc efg";
if (preg_match("/\b(你好|test)\b/u", $str))
{
    echo "a word was matched";
}

    I also need to mention that \b means word boundary, so it will only matches the exact words.